Use absolute path as the key

Author: gaearon

packages/react-fs/src/ReactFilesystem.js

@@ -11,6 +11,7 @@ import type {Wakeable, Thenable} from 'shared/ReactTypes';
 
 import {unstable_getCacheForType} from 'react';
 import * as fs from 'fs/promises';
+import {resolve} from 'path';
 
 const Pending = 0;
 const Resolved = 1;
@@ -85,11 +86,12 @@ export function readFile(
       },
 ): string | Buffer {
   const map = unstable_getCacheForType(createReadFileCache);
-  let entry = map.get(path);
+  const resolvedPath = resolve(path);
+  let entry = map.get(resolvedPath);
   if (!entry) {
-    const thenable = fs.readFile(path);
+    const thenable = fs.readFile(resolvedPath);
     entry = toResult(thenable);
-    map.set(path, entry);
+    map.set(resolvedPath, entry);
   }
   const result: Buffer = readResult(entry);
   if (!options) {

scripts/rollup/bundles.js

@@ -168,7 +168,7 @@ const bundles = [
     moduleType: ISOMORPHIC,
     entry: 'react-fs/index.node',
     global: 'ReactFilesystem',
-    externals: ['react', 'fs/promises'],
+    externals: ['react', 'fs/promises', 'path'],
   },
 
   /******* React PG Browser (experimental, new) *******/